{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-35600", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-03T21:25:12.162Z", "datePublished": "2026-04-10T16:07:07.846Z", "dateUpdated": "2026-04-14T15:01:18.724Z"}, "containers": {"cna": {"title": "Vikunja has HTML Injection via Task Titles in Overdue Email Notifications", "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/go-vikunja/vikunja/security/advisories/GHSA-45q4-x4r9-8fqj", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/go-vikunja/vikunja/security/advisories/GHSA-45q4-x4r9-8fqj"}, {"name": "https://github.com/go-vikunja/vikunja/pull/2580", "tags": ["x_refsource_MISC"], "url": "https://github.com/go-vikunja/vikunja/pull/2580"}, {"name": "https://github.com/go-vikunja/vikunja/commit/0f3730d045f20e261e3cdfc6d93c325653395b64", "tags": ["x_refsource_MISC"], "url": "https://github.com/go-vikunja/vikunja/commit/0f3730d045f20e261e3cdfc6d93c325653395b64"}, {"name": "https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0"}], "affected": [{"vendor": "go-vikunja", "product": "vikunja", "versions": [{"version": "< 2.3.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-10T16:07:07.846Z"}, "descriptions": [{"lang": "en", "value": "Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, task titles are embedded directly into Markdown link syntax in overdue email notifications without escaping Markdown special characters. When rendered by goldmark and sanitized by bluemonday (which allows <a> and <img> tags), injected Markdown constructs produce phishing links and tracking pixels in legitimate notification emails. This vulnerability is fixed in 2.3.0."}], "source": {"advisory": "GHSA-45q4-x4r9-8fqj", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-14T15:01:04.698920Z", "id": "CVE-2026-35600", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-14T15:01:18.724Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-35600", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-14T15:01:04.698920Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-14T15:01:13.639Z"}}], "cna": {"title": "Vikunja has HTML Injection via Task Titles in Overdue Email Notifications", "source": {"advisory": "GHSA-45q4-x4r9-8fqj", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}}], "affected": [{"vendor": "go-vikunja", "product": "vikunja", "versions": [{"status": "affected", "version": "< 2.3.0"}]}], "references": [{"url": "https://github.com/go-vikunja/vikunja/security/advisories/GHSA-45q4-x4r9-8fqj", "name": "https://github.com/go-vikunja/vikunja/security/advisories/GHSA-45q4-x4r9-8fqj", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/go-vikunja/vikunja/pull/2580", "name": "https://github.com/go-vikunja/vikunja/pull/2580", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/go-vikunja/vikunja/commit/0f3730d045f20e261e3cdfc6d93c325653395b64", "name": "https://github.com/go-vikunja/vikunja/commit/0f3730d045f20e261e3cdfc6d93c325653395b64", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0", "name": "https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, task titles are embedded directly into Markdown link syntax in overdue email notifications without escaping Markdown special characters. When rendered by goldmark and sanitized by bluemonday (which allows <a> and <img> tags), injected Markdown constructs produce phishing links and tracking pixels in legitimate notification emails. This vulnerability is fixed in 2.3.0."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-79", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-10T16:07:07.846Z"}}}, "cveMetadata": {"cveId": "CVE-2026-35600", "state": "PUBLISHED", "dateUpdated": "2026-04-14T15:01:18.724Z", "dateReserved": "2026-04-03T21:25:12.162Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-04-10T16:07:07.846Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*", "matchCriteriaId": "CC8B46CF-6E7B-46F4-8275-D1A38F2A6D5E", "versionEndExcluding": "2.3.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, task titles are embedded directly into Markdown link syntax in overdue email notifications without escaping Markdown special characters. When rendered by goldmark and sanitized by bluemonday (which allows <a> and <img> tags), injected Markdown constructs produce phishing links and tracking pixels in legitimate notification emails. This vulnerability is fixed in 2.3.0."}], "id": "CVE-2026-35600", "lastModified": "2026-04-17T21:56:40.090", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 2.7, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-04-10T17:17:03.680", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/go-vikunja/vikunja/commit/0f3730d045f20e261e3cdfc6d93c325653395b64"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/go-vikunja/vikunja/pull/2580"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/go-vikunja/vikunja/security/advisories/GHSA-45q4-x4r9-8fqj"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}